Again this year (2011) the festival was held at Mercedes World at Brooklands near Weybridge. Almost 1,500 smart* cars turned up to the event, despite the weather a few more than last year which took place on a glorious day.
* Spelling mistakes you might come across in this text are certainly accidental but "smart" written entirely lower case is intentional. That's the convention. I don't know why, it just is!